Operation Manual

Chapter 40 Access Control
GS1920 Series User’s Guide
344
40.7.2 SSH Overview
Unlike Telnet or FTP, which transmit data in clear text, SSH (Secure Shell) is a secure communication
protocol that combines authentication and data encryption to provide secure encrypted
communication between two hosts over an unsecured network.
Figure 252 SSH Communication Example
40.7.2.1 How SSH works
The following table summarizes how a secure connection is established between two remote hosts.
Table 178 SNMP IP Traps
OPTION OBJECT LABEL OBJECT ID DESCRIPTION
ping pingProbeFailed 1.3.6.1.2.1.80.0.1 This trap is sent when a single ping probe fails.
pingTestFailed 1.3.6.1.2.1.80.0.2 This trap is sent when a ping test (consisting of a series of
ping probes) fails.
pingTestCompleted 1.3.6.1.2.1.80.0.3 This trap is sent when a ping test is completed.
traceroute traceRouteTestFailed 1.3.6.1.2.1.81.0.2 This trap is sent when a traceroute test fails.
traceRouteTestCompleted 1.3.6.1.2.1.81.0.3 This trap is sent when a traceroute test is completed.
Table 179 SNMP Switch Traps
OPTION OBJECT LABEL OBJECT ID DESCRIPTION
stp STPNewRoot 1.3.6.1.2.1.17.0.1 This trap is sent when the STP root switch changes.
STPTopologyChange 1.3.6.1.2.1.17.0.2 This trap is sent when the STP topology changes.
rmon RmonRisingAlarm 1.3.6.1.2.1.16.0.1 This trap is sent when a variable goes over the RMON
"rising" threshold.
RmonFallingAlarm 1.3.6.1.2.1.16.0.2 This trap is sent when the variable falls below the RMON
"falling" threshold.